hackmann



In. 6|6,4|7. Patented Dec. 20, |898. F. HACKMANN. INDICATOR.

(Applicm'on med Nov. n, 1697.) (No Model.) 3 Sheets-*Sheet l.

NU. 6l6,4|7. Patented 000.20, |898. f F. HACKMANN.

INDICATOR.

(Appumion med mw. 2e, 1897.)

(No Model.) 3 Sheets-Sheet 3.

Z4 2 1 W f @JW/, I// ff da f2 ya 918739863138 90 S'MSA',

UNITED STATES PATENT OFFICE.

FREDERICK IIACKMANN, OF'MILNAUKEE, IISCCNSIBQ ASSIGNOR,B'Y

DIRECT AND MESNE ASSIGNMENTS, TO THE AUTOMATIC INDICATOR- COMPANY, CFSAME PLACE,

iNDicAToR.

SPECIFICATION forming part of Letters Patent No. 61B,417, dated'December 20, 1898. Application iiled November 26, 1897. Serial No.659,786. (No modelJ T0 tl/ZZ whom 'it 72mg/ concern:

Beit known that I, FREDERICK IIACKMANN, of Milwaukee, in the county ofMilwaukee and State 0f Wisconsin, have invented a new and usefulImprovement in Indicators, of which the following is a description,reference being had to the accompanying drawings, which are -a;part ofthis specification.

in contradistinction to marle's or dashes priuted on a movable slip ofpaper, as is now done in the most common form of lire-alarm indicators.if

A further object resides inthe provision of a construction which intl'iej'case of a .firealarm apparat-us, for instance is applicable t0any existing system in which alarm-boxes are provided in connectioniwith a make-andbreak electrical circuit.

Furthermore, my invention contemplates as objects sim plicity andchcapness of construction.

With the above and other incidental objects in view the inventionconsists of the devices and parts or their equivalents, as hereinaftermore fully set forth.

In lthe accompanying drawings, Figure 1 a side elevation with thepumpand other parts in section. Fig. 2 is a platz view of the comn pletemachine. Fig. 3 is a Ke'tion ou theline 3 3 of Fig. 2. Fig. 4 is asection on the line 4 i of Fig. 1, and Fig. 5 is a section through theprinting-roller. y

Referring to the drawings, the numeral (i indicates a base-plateprovided at one end with binding-posts 7, to which are connected,respectively, the supply and return wires. (Not shown.) x

Mounted upon the hase-board is a metallic frame consisting of a base 8,'provided at one end with an upwardlyfextending member 9,

preferably of arch-shaped form. The base S 5o is secured to thebase-board by being screwed or otherwise suitably connected thereto.v4 g

Supported on the base 8 is an electromagnet y 10. From the binding-posts7 extend wires 11 and 12, leading to the respective coils of 55 theelectromagnet. lhe armature 13 of the;

electromagnet is secured medially to a medial point of a pivoted lever1l. Near one end this lever has projecting laterally therefrom thepintles 15. 'lhe ends of these pintles 6o are pointed and turn in.recesses formed in the ends of adjusting-screws 16, said screws passi/ngthrough rthreaded openings lin the side arms of the upwardly-extendingarchshaped portion U of the base 8. These screws 65 are provided attheir outer ends with milled heads 17 for convenience in turning thesame. 'lhe screws also carry jam-nuts 18, which are adapted to be turnedagainst the side arms of the areh-shaped portion 9, so as to hold `7othe screws in adjusted position. Whenever it is desired to turn thescrews for the pur-y poseof adjustingthe bearings, the jam-nuts,

of course, are loosened. It is obvious that the farther inward the adjlisting-screws are 75 turned the greaterwill be the power required toturn the lever on its pivot, and when the Screws are turned outwardlythe lever will turn more freely or with less power. The lever hasdepending from its pivotal end a rod 8o lt,the lower end of which isengaged by one. end of a coiled spring 20.v 'lo the opposite end of thiscoiled springr is connected aser-ew 2l. This screw passes through aplain or uuthreaded opening in a post or upright`22 and 85 is providedfor a desired 'distance longitudinally with a groove 23. A pin 2textendsinwai-di y from the post and enters this groove. By thisarrangement the screw is prevented from rotating. Nuts 25 25' engage thescrew 9o on opposite sides of the post. The nut Lis adapted to be turnedso as to cause a ,longitudinal movement of the screw," and the nut 25'is adapted to be turned against the post when the desired adjustment ofthe screw is 95 obtained, thereby acting as a jam-nut and in connectionwith the nut 235 holding the screw against longitudinal movement afterproper adjustment of the same. By adjusting the screw 2l,it is obviousthat the tension of the spring 2O may be regulated, the function of saidspring being to return the lever an adjusting device, whereby the limitof thedown movement of the lever is regulated, the lower end of thescrew being adapted to contact with the lower member ofthe curved arm26. A jam-uut 2 9 is adapted to turn on the screw above the lever, andthis jam-nut by being turned against the lever serves to hold the screwto adjusted position. The extent of the upward movement of the lever isregulated by means of a similar screw 30, which turns in a threadedopening formed in the upper member of the curved arm 26, and with theend of which screw the upper side of the end of the lever is adapted tocontact on the up movement of said end of the lever. Thisscrew is alsoprovided with a milled head 3l for convenience in turning the same andcarries thereon a jam-nut 32, adapted to be turned against the upperside of the upper member of the curved arm 2li-in order to hold thescrewto adjusted position.

Extending outwardly from one side of a supplemental framework 33 is apivot-pin 34. On this,pin isv mounted a rocking lever 35. One end ofthis rocking leveris provided with an elongated slot 36, into which isadapted to extend a projecting pin 37 from the end of the lever 14.Mounted in the side pieces of the supplemental frame isa shaft 38, whichshaft has mounted fast thereon between the side pieces of thesupplemental frame a feedroller 39. The shaft 3s has also mounted fastthereon adjacent to one end of the feed-roller 39 a cog-wheel 40. `Oneof the ends of the shaft 38, which projects beyond the side of thesupplemental frame,has mounted thereon a ratchet-wheel 4l. Pivoted at amedial point to the angularly-benteud 42 of one arm of the rocking lever35 isa pawl 43. The upper end of this pawl engages the ratchettvheel,and to the lower end of the pawl is connected one end of the coiledspring 44. The opposite end of this coiled spring is connected to aprojecting arm 45; From this construction it will he seen that as theend of the lever 14 is forced downwardly it will throw the ehd of therocking lever 35, to which The upper end of this screw is Iratchet-Wheel will thereby be turned the distance of one tooth, and willconsequently rotate the shaft 38 and the drum and cog-wheel mounted uponsaid shaft. The cog-Wheel is held against backward rotation by means ofa spring-dog 46, secured at its lower end to the base and having itsupper end engaging the teeth of the ratchet-wheel.

Mounted in elongated bearings 47, formed at the upper ends of extensionsfrom the slipplemental frame 33, is a shaft 48, the ends of this shaftbeing squared to prevent said shaft from turning in its bearings. Onthis shaft is mounted a printingwheel 49 and also loosely a cog-wheel 50adjacent and fast to one side of the printing-wheel. l This wheel isshown in the :accompanying illustration of my invention as providedperipherally with a series of num bers,which are in the present exemplifiralion of lnyinvention designed to run from l to 9. The numbers, ifdesired, may be formed upon a peripheral'band 5l, of rubber or othersuitable yielding material, as clearly shown in Fig. 5. lt will also beseen from Fig. 5 that the wheel is' chambered or hollow, and'in t hischam bered or hollowed-out portion isarrangedaclock-springZ. One end ofthis spring is secured to the shaft 48and the otherend to the-.inside oft he wheel. When the Wheel is turned in one direction, it is obviousthat the spring is wound up tightly on the shaft, and the moment thewheel is released after being turned in such diret-tion the unwinding ofthe spring returns the wheel to its normal position. wheel is such that.the number l is in position to make the first imprint, and said positionis always secured by means of a pin 53, which enters a recess 54 in theprintit1g-\vheel, as clearly shown in Fig. 4. The end ofthe pin wit-'hinthis recess is formed with an enlargement or head 55, and betweenthis.head and theinner wall of the' recess -lis conlined a coiled spring56, which spring exerts a pres- IIO sure outwardly on the piti andnormally holds said piti outwardly, so as lo contact with a part of theframework, and constitutes said pin a stop for regulating the extent towhich the printing-wheel is rotated ,backward,'or, in other words, afterthe spring 52 has lmcoiled to permit. the printing-wheel to rotate.backward only so far as to bring the number l again in position to makethe lirst imprint. It will be understood that even at this point thereis some tension on the spring 52, as it is not fully unwound. is desiredto still further increase the tension of the printing-wheel 49, the pin53 can be pushed inwardly by the finger or otherwise against the actionof the coiled spring 56, so as to ext-end far enough into the recess 54ns to clear the framework. lhe wheel can then be given an additional tnrn or turns, whereby it is obvious that the tension' of spring 52'isincreased.

The numeral 57 indicates a y oke which has extending from one endthereof an arm 58.

If at any limeit y which receive the ends of the shaft 4S.'

The end of this arm is formed with an eye 5S), in which is fast a pin60. The ends of this pin are pointed and fit in recesses formed in theends of screws (51 G1, said screws being provided upon their outer endswith milled heads 62 for convenience in turning the same. Thescrews-pass through threaded openings in an angular bracket 63, andadapted to turn upon the screws are jam-nuts 54, which may be made tobear Iirmly against' the adjacent portions of the bracket, and therebyhold the screws firm to adjusted position. By providing these adjustablebearing-screws the yoke 51 may be. made to turn with more or lessfreedom, as desired. 'lhe side hars of the yoke 57 are provided withelongated slot-s G5, One of these side members is extended, as indicatedat 66, and the extremity of this extension is formed with an elongatedslot (37, which is adapted to receive the pin 37, projecting from theend ofthe lever 14.

Extending up from the base 8 is a post 68, which may be formed orprovided with a U- shaped portion G9, and extending up from thisU-shaped portion is a bifurcated arm 70, the fnl-cate parts of which areformed at their upper ends with bearings 71. Mounted in these bearingsis a shaft 72, which shaft carries an inking-roller 73, which rollercont-acts with the periphery of the printingwheel 49, so as tocontinnallysnpply ink to the type or numbers on said printing-wheel.Mounted in bearings just in advance of the feed-roller 39 is anothergrooved roller 74, which grooved roller is in close proximity to theperiphery of the feed-roller. board 6 are secured uprights 75, the upperends of said uprights being provided with openings which form bearingsfor the journals of a roller 76. This roller has radiating from oppositeends thereof the arms 77.

The numeral 78 indicates the strip of paper upon which the imprint ofthe printingwheel is to be made, said paper being wound upon the roller76, as clearly shown in Fig. 1, and being confined between the radiatingarms 77. The strip is then extended over the feedroller 39, thencebetween said feed-roller and the grooved roller 74, as clearly shown.The grooved roller therefore serves to keep the stripof paper inengagement with the periphery of the feed-roller.

Secured to an arm 79, extending from the supplemental frame 33, is thecylinder of an air-pump 80. This cylinderis provided in its bottom witha valve-opening 8l, which is controlled by means of a loose ball-valve8:2.v

Within the cylinder works a piston 83, and pivotally cpnnected to thispiston is the lower end of a stem Si. This stem passes through anopening in a screw-cap adjusted to the upper end of the cjlinder, andthe upper end of the stem has pivotally connected thereto a `rockinglever 85. The inner` end ofthis rocking lever is pivotally connected toa yoke 36, the downwardly-extending arms ofk said Near one end of thebase? yokestraddling the printing-wheel 49 and being bent into hook formto engage under the ends of the shaft 48 of said printingwheel. Thepivot of this rocking lever consists of a transverse in 87 the ends ofwhich pin are received in recesses formed in the ends of screws 88, saidscrews passing through threaded openings in opposite portions of anangle-arm S9, secured to and extending upwardly from the supplementalframe 33. These screws are also provided on their outer ends with milledheads 90 for convenience in turning the same, and have also turningthereon jam-nuts 91, which serve to hold the screws firmly to adjustedposition.

The above being a description of the parts of my invention, itsoperation will now be p explained. For instance, if itis supposed thatit is used in connection and in circuit with an electrical fire-alarmsystem the indicator is located at a suitable point where itis desiredthe alarm should be 1ecorded-as, for rinstaneeLat a police-station. Ifnow an alarm' is turned at any particular box by aperson properlymanipulating the turn-in lever of the box, so as to produce amake-and-break current, the electricity passing over the linewire willbe conducted to either of the binding-posts 7, and from thence by eitherof'the wires 11 or 12 (in accordance with which wire is the supply-wire)to the electromagnet. As this magnet is energized the Aarmature is drawntoward and to the cores of the magnet. to the lever 14, of course saidlever is caused to turn on its pivot, causing the opposite end thereofto descend. NVith this descent of the end of the lever 14 the rockinglever 35 is turned on its pivot, so as to move the dog 43 to a point toengage the next tooth of the ratchet-wheel 41. At. the same time theextended arm G6 of the yoke 57 is brought downwardly, so as to cause theprinting-wheel to descend and at the same time the teeth of thecog-wheel 50 to-engnge the teeth of the cog-wheel 40. The descent of theprintingwheel causes the imprint of the uutnber1, on the strip ot' paper'78,which paper passes between said printing-wheel and the feed-wheel39. With thc down movement of the printing-wheel also the yoke 86 ispulled downward ly, and this causes a turningoi the rocking lever and aconsequent uplifting of the piston-stern 84 and its piston 83 and latthe same time a raisingot' the valve 82 to permit air to enter thecylinder 8L). At this time the current is broken, vand the moment this0ccurs the armature 13 is no longer attracted to the elevtromagnet, andconsequently the le- Aver 14 is free to return toits normal position.

'lhis has the effect at the same time of rocking the lever 35, seas toreturn to its normal position, and causing the dogcarried thereby torotate the ratchet-wheel 4l the distance of one tooth.l As the cog-wheel4U is carried on the same shaft with the ratchet-wheel 41, saidcoc-wheel 40 is also therebv rotated. and the IOO IIO

roller 39, which is likewise mounted on the same shaft with thecog-wheel 40 and ratchetfed forwardly a suiiicient distance to present aclear space for the imprint of the next number.` With the uplifting ofthe armature the yoke 57 is also free to turn back to its normalposition. This turning back of said yoke is just suiiicient toraise theprinting-roller clear of the feed-roller, so as to allow-for the passageor forward movement of the strip of paper. It is notraised, however, bysaid yoke suiciently high to clearthe teeth of the cog-wheel 50 from theteeth of the cog-wheel i0. When, however, there is a period of restbetween the makes and breaks, the cog-wheel 50 is raised suiciently highto-clear the'y tefeth of the cogwheel 40 by reason of the-uplifting ofthe yoke 8G, the arms of vwhichengage the shaft 48 and are movedupwardly| the moment the yoke 57 has been turned, asfhereinbeforedescribed. It will be noticed that the slots in the arms of the yoke 57are somewhat wider than the diameter ot the shaft 48, so that after theyoke 57 has completed its full movement the yoke 86 is still permittedto move upwardly far enough to biting the shaft 48 into contact with theupper edges of the slots 65, and this distance is suliieiqnt to clearthe teeth of the cog-wheel 50 from the teeth of the cog-wheel 4.0. Theyoki'eBU is caused to move upwardly gradually by the rocking lever andthe connection between said rocking lever and the piston 831`of theair-pump. As said rocking-lever S5 is thrned on its pivot the piston iscaused to slowly descend, being resisted by the air beneath the same,which is permitted to escape slollwly through the -valve-opening of thecylinder, owing to the loose fit of the ball-valve 82.2v By the time thepiston 83 has made its full descent the cog-wheel 50 is raised to itshighest extent, which is, as before stated, to such a point as to clearthe teeth of the resp tive cog-wheels. The moment thisclearance ,occursthe coiled spring 52 within'theprintingwheel causes a reverse rotationof said printing-wheel to such an extentas to again bring thenumber l onthe under side of the printing-wheel to such position as to make thenext succeeding imprint, it being understoo'd that this reverse rotationof the printing-wheel is limited by the stop-pin 53. ,5

In the use of my invention/in a lire-alarm system it will be supposedthat an alarm is turned in from box 23. The momentthe current is made orcompleted to the indicator and the printing of the number l is caused onthe strip of paper the current is then again broken and quicklycompleted again before the teeth of the cog-wheels 50 and 40 have had achance to disengage and causing the printing of the number 2. After thenumber 2 is struck there is then a period of rest in the make-and-breakcurrent, which allows suiicient time for the printing-wheel to ascendfar enough to disengage the teeth of the cogs 50 and i0. The moment thisdisengagement takes place the coiled spring 52 unwinds and returns theprinting-wheel to a position in which the number l is again on the underside of the roller directly above the strip of paper and in line to makean imprint. The period of cessation of the make and break is followed bythree rapid make-and-break currents, which respectively cause theprinting of the numbers 1, ,2, and 3, and the printing of this lastnumber 3 is followed by another period of rest, which allows of thedisengagement of the teeth of the two cog-wheels and the return of theprintingwheel to its normal position. 'lhe alarm is read by reading thelast figure after l as often as the number l7 occurs. For instance, onthe strip of paper shown in Fig. 2.

the numbers l i 1 2 3 are shown. The last figure following the first lis 2,and the last figure following the second l is 3, thus indicatingthat the alarm is 23. This system of reading the alarm is true withrespect to any alarm which may be turned in.

While-I have described certain detailsof 'construction in the foregoingdescription, yet

l do not wish to be understood as limiting myself to the specificconstruction of many of the parts hereinbefore described, inasmuch asmany of such' parts may be changed or modified withoutmateriallydeparting from the spirit and scope of myinvention. l also do not wishto be understood as restricting myself to a printing-wheel havingnumbers or digits on the periphery thereof, inasmuch as any othersuitable characters may be employed to suit the purposes to which theindicator is applied.

What l claim as my invention is-- 1. In an electrical indicator,thecombination, of an electrical circuit, a lever adapted to be turnedfrom its normal position on each completion of the circuit, aprinting-wheel,

IOO

ric

means for feeding paper, or other suitable material to be printed upon,toy the wheel, mechanism between the printing-wheel and the lever, saidmechanism adapted, as the 1ever is turned from its normal positiomtocause the printing-wheel to contact with and make an imprint upon thestrip of paper, or other suitable material, and on the breaking of thecurrent to cause the printing-wheel to revolve, and the feedingmechanism to feed the paper forward, the revolving of the printing-wheelcausing the next succeeding numberor character thereon to be brought andheld in place, when followed by a subsequent instant com- ,pivotallyconnected to the other end of the pletion of the current, and mechanismadapted, during a cessation of the electrical makes and breaks, to causethe printing-wheel to return to its normal position for printing itsinitial number or character.

2. In an electrical indicator, the colnbination, of an electricalcircuit, a lever adapted to be turned from its normal position on eachcompletion of the circuit, a printing-wheel, a feed-wheel adjacentthereto, mechanism between the wheels and the lever, said mechanismadapted as the lever is turned from its normal position to cause theprinting-wheel to contact with and make an imprint on a strip ofsuitable material between the wheels, and on the breaking of the currentto cause the printing-wheel to move out of eontaetwith thefeeding-wheel, and the two wheels to revolve, and the paper thereby fedforward, the revolving of the printing-wheel causing the next snceecding num ber or character thereon to be brought and held in place whenfollowed bya subsequentinstant completion of the current, and mechanismadapted, during a cessation of the electrical makes and breaks, to causethe printing-wheel to return to its normal position for printing itsinitial number or character.

3. In an electrical indicator, the combination` of an electricalcircuit, an electromagnet within the circuit, an armature for theelectromagnet, a pivoted lever "secured to saldarmature,aprinting-wheel, a feed-wheel adjacent thereto, mechanism between thewheels and the lever, said mechanism adapted, as the lever. is turnedfrom its normal position by the completion of the current, to cause theprinting-wheel to engage the feed-wheel and make an impression on astrip of suitable material passed between the wheels, and onl thebreaking of the current to throw the printingwheel out of engagementwith the feedingwheel and to also cause the two wheels to revolve andthe stri p of material to be fed forward, the revolving of theprinting-wheel causing the next succeeding numberor character thereon tobe brought into position for printing, and to hold the wheel at suchposition whenever the first make and break is followed by asubsequent-instant completion of the current, and mechanismadaptedduring a cessation of the electrical. makes and breaks to causethc printing-wheel to return to its normal position for printingitsinitial number or character.

et. In an indicator, the combination, of an operating-lever, means forturning said lever from its normal position, a shaft, a feed-wheelmounted on saidl shaft, a cog-wheel and a ratchet-wheel also mounted onsaid shaft,

another shaft mounted movably in bearings, l

aprinting-wheel and a cog-wheel mounted on the latter shaft, a rockinglever havingone end connected to the operating-lever, a dog rockinglever and adapted'to engage the teeth of the ratchet-wheel; andmeehanismvbetween the end of the operating-lever and the printsing-wheel, said mechanism adapted as the operating-lever is turned onits pivot in one direction to cause the printing-wheel to engage thesurface of the feed-wheel and the two cog-wheels to mesh, and whenoperated in the'opposite direction adapted to throw the printing-wheeland the feed-wheel out of engagement and the two cog-wheels also ont ofengagement.

5. In an indicator, the combination, of an operating-lever adapted to beturned from its normal position,ashaft,a feed-wheel mounted von saidshaft, a cog-Wheel and a ratchet-wheel also mounted on said shaft,another shaft mounted movably in bearings, a printingwheel, and acog-wheel also mounted on said shaft, a rocking lever having one endconnected to the operating-leveiga dog pivotall)7 connected to vtheother end of the rocking lever and adapted to en gage the teeth of theratchet-wheel, mechanism between the end of the operating-lever and theprinting-wheel, said mechanism adapted as the operatinglever is turnedin one direction to cause the printing-wheel to engage the surface ofthe feed-wheel and the two cog-wheels to mesh, and when operated in theopposite direction adapted to throw the printing-wheel and thefeed-wheel out of engagement and also the two cog-wheels out ofengagement, and meehanism adapted during aeessation of' the movements.of the operating-lever to cause the printing-wheel to return to itsnormal position.

6. In an indicator, the combination, of an operating-lever adapted to beturned from its normal position,a shaft,a feed-wheel mounted on saidshaft, a cog-wheel and a ratchet-wheel also mounted on said shaft,another shaft mounted movably in bearings, a printingwheel and acog-wheel also mounted. on said shaft, a rocking lever having one endconnected to the operating-lever, a dog pivotally connected to the otherend of the lever and adapted to engage the teeth of the ratchetwheel,and a pivoted yoke having its arms provided with elongated slots adaptedto receive the ends of the shaft of the printing-A wheel, one end ofsaid yoke being extended so as to engage the end of the operating-lever.

7. In an indicator, the combination, of an operating-lever, means forturnings id lever from its normal position, a shaft, a fe d-wheelmounted on said shaft7 a cog-wheel and a ratchet-wheel also mounted onsaid shaft, another shaft mounted movabl-.y7 in bearings, aprinting-wheel and a cog-wheel moiinted on said shaft, a rocking leverhaving one end connected t0 the operating-lever, a dog pivotallyconnected to the .other end of thelever and adapted'to engage the teethof the ratchetvwheel, a pivoted yoke having its arms provided withelongated slots'adapted to receive the ends of the shaft ofthe`printing-wheel, said slots being wider' than the diameter of theends of the shaft, and oneof said arms being extended so as to engagethe end of IOO IIO

the operating-lever, and a device also engaging th ends of the shaftotthe printingwheel,` and adapted to pull said Wheel a greater distanceaway from the feed-wheel than said printing-wheelis pulled by theyoke,the latter augmented movement of the printing-wheel adapted to cause adisengagement of the teeth of the cogs.

8 in an indicator, the combination,v of an operating-lever, means forturning said lever from its normal position, ashaft, afeed-wheel mountedon said shaft, a cog-wheel and a ratchet-wheel also mounted on saidshaft, another shaft movable in bearings, a printingwheel and acog-wheel mounted on said shaft, a rocking lever having one endconnected to the operating-lever, a dog pivotally connected to the otherend of the lever and adapted to engage the teeth of the ratchet-wheel, apivoted yoke having its arms provided with elongated slots adapted toreceive the ends ofthe shaft of the printing-wheel, said slots beingwider than the diameter ot the ends of the shaft, and one of said armsbeing extended so as to engage the end ot` the operating-lever. a yokealso engaging the ends of the shaft ot' the printing-wheel, a lever to.vhichsaid yoke is connected, and means for operating said lever. d, l

9. In an indicator, the combination, of an operating-lever, means forturning said lever from its normal position, a shaft, a feed-wheelmounted on said shaft, a cog-wheel and a ratchet-wheel also mounted onsaid shaft. an

i other shat't movable in bearings, a printing;-

wheel and a cog-wheel mounted on said shaft, a rocking,` lever havingone end connected to the operating-lever, a dog pivotally connected tothe other end of the lever and adapted to engage the teeth of theratchet-wheel, a pivoted yoke having its arms provided with elongatedslots adapted to receive the ends of the shaft of the printing-wheel,said slots being wider than the diameter of the ends of the shaft, andone of said arms of the yoke being,T extended so as to engage the end ofthe operating-lever, another yoke also engaging;l the ends of the shaftof the printing-wheel, a lever adapted as the lever to which said yokeis connected, and an airpump having the pistonestem `thereof connectedto the end of the last-referred-to lever.

1G. In an indicator, the combination, of a printing-wheel, a shaft onwhich said wheel is mounted, a spring connected at one end to saidshaft, and having,r its opposite end connected to the wheel, and acontact-pin extending laterally from a recess of the printing-wheel, andadapted when the wheel is turned .in a direction to Wind the spring tobe pressed inwardly into the recess in order to clear a fixed point orstop of a framework.

l1. In an electrical indicator, the combination, of an electricalcircuit, a lever adapted to be turned from its normal position on eachcompletion of the circuit, a printing-wheel, a feed-wheel adjacentthereto, another wheel in advance of the teed-wheel, a roller, a stripof material wound on said roller and extended between the feed-wheel andthe printingwheel and also between the feed-wheel and the rollerinadvance of said feed-wheel, mech-- anism between the feed-wheel and theprinting-wheel and the lever, saidmechanism is turned from its normalposition to cause the printing-wheel to descend and make an imprint onthe strip 'ot material passing,` between the wheel, and on the breakingof the current to cause the printing-wheel to ascend and the two wheelsto revolve and the paper to be Jfed forward, the revolving of theprinting-wheel causing,r the next succeeding number or character thereonto be brought and held in place whenever followed byan instantcompletion of the current, and mechanism adapted, during a cessation ofthe electrical makes and breaks, to cause the printing-wheel to returnto its normal position to print the initial number or character on thestrip ot material to be printed upon.

In testimony whereof I aiiix my signature in presence of two witnesses.

F REDERICK HACKMANN,

Vitnesses:

A. L. MoRsnLL, ANNA V. FAUsr.

